爆炸喷涂Cr_3C_2-25NiCr涂层的微观结构及性能
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摘要
为了使Cr_3C_2-NiCr涂层能够应用于水力机械表面,采用爆炸喷涂技术在0Cr13Ni4Mo不锈钢基材表面制备了Cr_3C_2-25NiCr涂层,通过扫描电镜(SEM)、X射线衍射仪(XRD)、金相分析仪、拉伸试验机、显微硬度计、摩擦磨损试验机、电化学工作站等手段研究分析了该涂层的微观形貌、孔隙率、结合强度、显微硬度、耐磨性能、耐蚀性能等。结果表明:爆炸喷涂Cr_3C_2-25NiCr涂层具有高致密结构,平均孔隙率仅为0. 76%,并且其结合强度高达82 MPa;涂层平均显微硬度为1 026 HV2 N,远高于基体;且在相同试验条件下,涂层的磨损量仅为基体的1/72;同时涂层还具有远高于基体的耐腐蚀性能。
In order to enable the Cr_3C_2-NiCr coatings applicable to hydraulic machinery surface,Cr_3C_2-25NiCr coatings were prepared on0 Cr13 Ni4 Mo stainless steel by detonation spraying method. The microstructure,porosity,bond stress,micro-hardness,wear resistance and corrosion resistance of coatings were analyzed by scanning electron microscope( SEM),X-ray diffractometer( XRD),metallographic analyzer,adhesion testing machine,micro-hardness measurement,tribometer and electrochemical workstation. Results showed that the detonation spraying Cr_3C_2-25 NiCr coating possessed the high-density structure with only 0.76% of average porosity,and the binding strength reached82 MPa. The average microhardness of the coatings was 1 026 HV2 N,much higher than that of the substrate. Meanwhile,the abrasion loss of the coatings was only 1/72 of that of the substrate under the same test condition,and the coatings had much higher corrosion resistance than the substrate.
In order to enable the Cr_3C_2-NiCr coatings applicable to hydraulic machinery surface,Cr_3C_2-25NiCr coatings were prepared on0 Cr13 Ni4 Mo stainless steel by detonation spraying method. The microstructure,porosity,bond stress,micro-hardness,wear resistance and corrosion resistance of coatings were analyzed by scanning electron microscope( SEM),X-ray diffractometer( XRD),metallographic analyzer,adhesion testing machine,micro-hardness measurement,tribometer and electrochemical workstation. Results showed that the detonation spraying Cr_3C_2-25 NiCr coating possessed the high-density structure with only 0.76% of average porosity,and the binding strength reached82 MPa. The average microhardness of the coatings was 1 026 HV2 N,much higher than that of the substrate. Meanwhile,the abrasion loss of the coatings was only 1/72 of that of the substrate under the same test condition,and the coatings had much higher corrosion resistance than the substrate.
引文
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[13]李惠,程晓农,谢春生,等.Cu Co2Be表面热喷涂制备Cr3C2-Ni Cr涂层的微观结构及高温摩擦磨损行为[J].稀有金属材料与工程,2014,43(8):2 011-2 016.
[14]周小龙,曾德长,王刚,等.AC-HVAF制备Cr3C2-25CoNiCrAlY和Cr3C2-25NiCr涂层的高温氧化及摩擦磨损行为[J].中国表面工程,2017,30(5):102-109.
[15]纪岗昌,李长久,王豫跃,等.超音速火焰喷涂Cr3C2-Ni Cr涂层磨粒磨损行为[J].材料热处理学报,2002,23(4):34-38.
[2]乐有树,刘敏,李建雄,等.Cr3C2-Ni Cr涂层的工程化应用研究[J].稀有金属材料与工程,2010,39:448-450.
[3]金云学,岳佳!,王昌华,等.铸铁轧辊表面Cr3C2-Ni Cr涂层的显微组织[J].金属热处理,2012,37(12):43-45.
[4]LI J F,DING C X,HUANG J Q,et al.Wear mechanism of plasma-sprayed Cr3C2-Ni Cr against Ti O2coating[J].Wear,1997,211(2):177-184.
[5]FERNANDEZ J,DELGADO J.Effects of thickness coating on the electrochemical behaviour of thermal spray Cr3C2-Ni Cr coatings[J].Surface and Coatings Technology,2002,153(2/3):107-113.
[6]解明祥,张世宏,李明喜,等.超音速火焰喷涂Cr3C2-25NiCr涂层高温摩擦磨损性能[J].材料热处理学报,2012,33:129-133.
[7]吴燕明,赵坚,陈小明,等.高温及氧化对WC-10Co4Cr涂层微观结构及性能的影响[J].中国有色金属学报,2017,27(7):1 395-1 402.
[8]赵坚,陈小明,吴燕明,等.热处理对超音速火焰喷涂WC涂层微观结构及性能的影响[J].兵器材料科学与工程,2017(2):100-104.
[9]王俊,张立,李可,等.爆炸喷涂Cr3C2-Ni Cr涂层及其在连铸辊上的应用[J].上海交通大学学报,2000,34(8):1 018-1 021.
[10]黄传兵,杜令忠,张伟刚,等.三种热喷涂工艺制备Ni Cr/Cr3C2-Ba F2·Ca F2涂层的结构与性能[J].航空材料学报,2009,29(6):70-76.
[11]盛选禹,雒建斌.Cr3C2-25%NiCr涂层抗滚动接触疲劳磨损性能的研究[J].材料保护,1997(8):15-17.
[12]秦清彬.燃气工艺参数对超音速火焰喷涂Cr3C2-Ni Cr涂层性能的影响[J].表面技术,2011,40(4):55-57.
[13]李惠,程晓农,谢春生,等.Cu Co2Be表面热喷涂制备Cr3C2-Ni Cr涂层的微观结构及高温摩擦磨损行为[J].稀有金属材料与工程,2014,43(8):2 011-2 016.
[14]周小龙,曾德长,王刚,等.AC-HVAF制备Cr3C2-25CoNiCrAlY和Cr3C2-25NiCr涂层的高温氧化及摩擦磨损行为[J].中国表面工程,2017,30(5):102-109.
[15]纪岗昌,李长久,王豫跃,等.超音速火焰喷涂Cr3C2-Ni Cr涂层磨粒磨损行为[J].材料热处理学报,2002,23(4):34-38.